Mathematic content in Biochemistry?

If you didn't take math at AS/A level and were like a B/A at GCSE how much would you struggle?

Math isn't my strong point but my goal is to study Biochemistry at a top university, such as UCL. I am planning to get a summary of the mathematic content in Biochemistry and working on it during my time in sixth form and in a gap year if I choose to have one.

I feel as if I won't be able to get an A grade at A level maths so I'm not planning on taking it, and just working on what I need for Biochemistry. If this will work or not, well I hope though. I can't be the only person who didn't take mathematics and wants to pursue Biochemistry - if I need too I'll take mathematics, I guess, I just don't feel like I'll get the grade I needed and if I do it'll be a miracle haha.